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(No Model E. KORBEL & L. KURZ.

LOCK. I

No. 309,963. jfs?, 3V Patented Deol 30, 1884.

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LOCK.

SPECIFICATION f0.5ming part of Letters Patent No. 309,9/63, dated December 30, 1884.

Applicaiim file@ July 16,1884.

To all whom, t 71u03/ concern:

Be it known that we, ERNEs'r KORBEL and LOUIS KURZ, both of the city, county, and State of New York, have invented a new and useful Improvement in Loc-ks; and we dor hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specication.

Our invention relates to that class of locks known as spring-locks, and has for its object the formation of a simple locking device, in combination with the latch-bolt of the lock, whereby a movement of the bolt may at pleasure be rendered impossible without the use. of a properly-tted key.

It consists in pivoting a stop or locking plate upon the sliding bolt or latch of the lock in such a position as that when properly set it will contact with the front edges of a series of sliding tumblers, and thereby prevent any movement of the bolt until such time as the tumblers are so moved by a properly-fitted key as to bring aseries of notches or slots formed in their front edges into line with each other, and into register with the stop upon the bolt, so that the edge of the stop may enter said notches to permit a movement of the bolt.

In the accompanying drawings, Figure l is an interior view of our improved lock, showing the locking plate and illustrating the movement thereof; Fig. 2, a transverse section on line fr a' of Fig. 1; Fig. 3, aview ofthe inner or under side ofthe covering-plate carrying the tumblers; Fig. 4, a plan view of the key required to open our improved lock, and Fig. a side view of one of the sliding tuinblers of the lock.

A is the body of the lock, provided with a rim, H, fixed thereto to form the sides of the case. Through the front end of this case works the spring-actuated latch-bolt B, beveled toward its inner side to make it self-acting in one direction. The portion of the bolt working within the case is preferably made in the form of a frame, B', working between the guides BF B2, and a spring, C, is placed to one side thereof, upon a rod, C', fixed to the frame, and working through one of the guide-blocks, G, upon the case. The tendency of the spring is to throw the bolt forward. The bolt is op- (No model.)

erated to withdraw it by an ordinary knob, (not shown in the drawings,) the spindle of which passes through the cam D, which is adapted to bear against the rear end of the frame B, carrying the bolt, or upon lugs formed thereon. Upon the forward end of the bolt and within the caseis pivoted a stopplate, E, of irregular shape, (see Fig. 1,) and 'immediately behind this plate are placed the sliding tumblers F, working in a case, F, at-A tached to the outer lock-plate, K. These tumblers are in the form of thin plates (see Fig. 5) placed within their case side by side, to play at a right angle with the bolt, and with their edges toward the front end of the lock,

as illustrated in Fig. 2, and they project slightly within the case A, in such a position as to engage the rear edge of the plate E and prevent a movement of the bolt B, to which said plate is attached. These tumblers are held within their case by means of a set of springs, F2, attached to the inner side of the case A, as shown in Figs. 2 and 3. In the front edge of each tumbler F, and at a distance from its lower end,which diifers in each, a slit-or notch,

j", is formed, the depth of which is determined by the extent of the movement required in the bolt to withdraw the latch from its guard.

To retract the bolt or latch, it is necessary to press inward upon the tumblers so that the slits or notches f fin all of them will fall into the same right line in register with the edge of the plate E, (see dotted lines, Fig. 2,) and this is accomplished by means of a key, M,

Fig. 4, vformed at its end into wards of diercnt lengths. (See Fig. et.) The plate E is partially cut away, (see at r, Fig. 1,) so that when turned in one position (see full lines, Fig. l) it will allow the bolt to move without coming into contact with the tumblers; but when the IOO The Combination, in :L look, with n springaotuated bolt, and with one or more adjustable tulnblers supported at right angles thereto, of l :in adj nsmble stop-plate pivoted upon the bolt l mid adapted ,to engage the tu mblers, Kund i thereby prevent u movement of the bolt until, by their adjustment, @notch in euch is brought i into register with all the others und with the stop-plate, to permit the latter to enter said notches, substantially in the manner and for tho purpose herein set forth.

In testimony whereof we have signed our naines to this specification in the presence of two snbsC-ribin Witnesses.

ERNEST KoRBnL. [L s] Louis KURZ. [L sg Vitnesses:

HENRY MET-z, E. Oi PERKINS. 

